chore(deps-dev): bump postcss from 8.4.27 to 8.4.28 (#967)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.27 to 8.4.28.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.27...8.4.28)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -32,7 +32,7 @@
     "mocha": "^10.2.0",
     "mocha-play": "^6.0.0",
     "playwright-chromium": "^1.37.0",
-    "postcss": "^8.4.27",
+    "postcss": "^8.4.28",
     "promise-assist": "^2.0.1",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",